نتایج جستجو برای: land equivalent ratio

تعداد نتایج: 743286  

Journal: :بوم شناسی کشاورزی 0
محمد نباتی نساز عبدالقیوم قلی پوری معرفت مصطفوی راد

introduction multiple cropping such as intercropping plays an important role in agriculture because of maximizing beneficial interactions. intercropping of legumes and cereals is an old practice in tropical agriculture that dates back to ancient civilization. maize-legume intercrops could substantially increase forage quantity and quality and decrease requirement for protein supplements (ahmad ...

Journal: :به زراعی کشاورزی 0
مجتبی خزائی دانشجوی دکتری اکولوژی گیاهان زراعی، گروه زراعت، دانشکدة کشاورزی، دانشگاه ایلام، ایلام، ایران

to evaluate yield and productivity indices of maize and sugar beet intercropping with different planting ratios, a field experiment was conducted in randomized complete block design with three replication at hamedan province in nahavand, in 2013. the planting ratios were 100:0, 75:25, 50:50, 25:75 and 0:100 (maiz: sugar beet) using replacement method. results showed that intercropping had signi...

Journal: :زراعت دیم ایران 0
جواد لامعی هروانی مرکز تحقیقات کشاورزی و منابع طبیعی زنجان خشنود علیزاده دیزج موسسه تحقیقات کشاورزی دیم کشور

in order to evaluate quantity and quality hairy vetch (vicia villosa l.) yield in the pure and mixed cropping with barley (hordeum vulgare l.) and triticale (triticosecale) the experiment was conducted at agricultural research station (khodabande) under dryland conditions during 2006 -2008. field experiments were arranged in a randomized complete blocks design with 9 treatments in four replicat...

2002
Ellen McFadden

Intercropped corn (Zeu mays L.) and soybean [Glycine mux (L.) Merr.] may produce more total yield per hectare than either grown separately, ie., land equivalent ratio (LER) >l. Low N fertility, limited moisture, and weed competition have each been reported to result in high land equivalent ratios. Thus it was hypothesized that intercropping advantages were greater under stress conditions. The o...

Journal: :مدیریت خاک و تولید پایدار 0
فریده کریمی دهکردی فارغ التحصیل کارشناسی ارشد دانشگاه آزاد اسلامی خوراسگان واحد اصفهان احمد جلالیان استاد گروه خاک شناسی، ، دانشکده کشاورزی دانشگاه آزاد اسلامی واحد خوراسگان (اصفهان)، اصفهان عبدالمحمد محنت کش عضو هیات علمی مرکز تحقیقات کشاورزی و منابع طبیعی استان چهارمحال و بختیاری ناصر هنرجو استادیار گروه خاک شناسی، ، دانشکده کشاورزی دانشگاه آزاد اسلامی واحد خوراسگان (اصفهان)، اصفهان

this study was conducted to investigate the type and origin of clay minerals via several profiles in lordegan hilly lands. the profiles were located in two kinds of land uses including forest and dry farm at different slope positions as sampling sites. the soil saples were collected from two depths of soil horizons to indicate cec, soil texture, oc%, calcium carbonate equivalent, x-ray diffract...

Journal: :international journal of nano dimension 0
a. pourasghar young researchers and elite club, islamic azad university, central tehran branch, tehran, iran. s. kamarian young researchers and elite club, islamic azad university, kermanshah branch, kermanshah, iran.

effective elastic properties for carbon nanotube reinforced composites are obtained through a variety of micromechanics techniques. an embedded carbon nanotube  in  a  polymer  matrix  and  its surrounding  interphase  is  replaced with an equivalent fiber for  predicting  the  mechanical  properties of  the  carbon  nanotube/polymer composite. the effects of an interphase layer between the nan...

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